v2.4.0.6
Employee Benefit Plans (Details 5) (Defined Benefit Pension Plan [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Pension Plan [Member]
   
Accumulated other comprehensive loss (income):    
Net actuarial loss (gain) $ 1.7 $ (40.2)